Electromagnetic valve-grinder.



Patented June 26, 1917.

2 SHEETS-SHEET I.

C. A. HINK. ELECTROMAGNETIC VALVE GRINDER.

APPLICATION FILED MAYI. 1915.

0 III [III I JII ucIIloz 61 Ho: nuf

nfed J 11110 26, 1917.

7. SHEETS-SHEET 2.

C. A. HINK.

ELECTROMAGNETIC VALVE GRINDER.

APPLICATION FILED MAY 7, I9I5.

Pate

L TE S CHARLES A. HINK, OF GRINNELL, IOWA.

ELECTROMAGNETIC VALVE-GRINDER.

Specification of Letters Patent.

Application filed May 7, 1915. Serial No. 26,614.

To all whom it may concern:

Be it known that I, CHAnLEs A. HINK, a citizen of the United States, residing at Grinnell, in the county of Poweshiek, State of Iowa, have invented certain new and useful Improvements in Electromagnetic Valve-Grinders; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an electro-magnetic valve grinder.

An object of the invention resides in the provision of a device of this character by means of which valves may be ground upon their seats.

A further object of the invention resides in so constructing the device that the valve will be magnetically held so that it may be raised from the seat to permit the application of an abrasive material.

A further object of the invention resides in so constructing the device that the valve will be given an oscillatory movement during the grinding thereof.

WVith these and other objects in view, such as will appear as the description progresses, my invention comprises the combination and arrangement of parts as set forth in and falling within the scope of the appended claim.

Referring to the drawing:

Figure 1 is a. side elevation of my device.

Fig. 2 is a top plan view.

Fig. 3 is a rear elevation.

Fig. 4 is a front elevation.

Fig. 5 is a vertical sectional view.

Fig. 6 is a similar view taken at right angles to Fig. 5.

Fig. 7 is a horizontal sectional view taken immediately above the solenoid magnet and looking at the top of the same on line 7-7 of Fig. 3.

Fig. 8 is a perspective view of a bit used with a different type of valve.

Referring to the drawing wherein like parts are indicated by like characters throughout the several views:

In the embodiment of my invention shown in the drawings, 1 have provided a casing 1 in which is located a shaft 2. Se

cured to one end of this shaft 2 is a=ge ar wheel 3 which meshes with a smaller gears 1 mounted within the casingand operavalves of one type.

tively connected to the armature of a n10- tor 5 which is mounted on the said casing. Extending between the motor and the easing 1 is a handle 6 by means of which the device may be lifted. On the other end of the shaft 2 is a plate 7 which has a pair of concentric-segmental beveled, gears 8 and 9 on the face thereof. Extending vertically in this casing 1 is a shaft 10 which is mounted in bearings 11 and has beveled pinions 12 and 13 which are adapted to cooperate with the segmental gears 8 and 9. Extending downwardly from the casing are a pair of non-magnetic arms 14 which are made preferably of brass and On the lower end of which an eleetro-magnet 15 is mounted. The lower end of the shaft 10 terminates in spaced relation to the top of the said magnet and has a socket 16 secured thereon into which a bit 17 extends and is secured by a cotter pin 18. The lower end of this bit is provided with a transversely extending aperture in which is loosely mounted a jaw 19 having a pair of downwardly extending fingers 20 thereon which are adapted to fit into a pair of holes such as located in the face of This jaw 19 is maintained in a horizontal position, normally, by a pin 21 which is engaged with the upper face of the said jaw, resiliently, by means of a spring 22. l he wires from the magnet 15 lead to a' suitable controlling button 23 on the handle 6 and the wires from the motor 5 lead to a button 24 on the handle. Thus the stopping of the motor or the denergizing of the magnet may be accomplished independently.

There are certain valves in which there is a slot in the upper face and in order that my machine may be used in connection with that type, I have provided a bit, such as illustrated in Fig. 8 of the drawing, which resembles very closely a screw driver and may be put in place on the machine by the mere removal of the bit 17 and the replacing thereof by the bit shown in Fig. 8.

The machine is used in the following manner irrespective of the type of bit used. The

current is turned on by means of the button 23 so that the magnet 15 may be energized.

The energizing of the magnet 15 will of course magnetize the bit which is used therewith, inasmuch as the bit virtually forms the core of the magnet. The bit is engaged withthe holes'or slot'in the face of. the

Patented June 26, 1917.

valve as the case may be and the valve will be held on the bit by the magnetic force therein. The valve may then be raised from its seat and an abrasive material placed on the said seat. The machine is then moved so that the valve will be replaced upon its seat. The button 24 is then operated so that the motor will be energized and will cause the rotation of the plate 7. As this plat rotates the pinion 12 will be engaged by the segmental gear 8 and the bit and valve r0- tated in one direction, then the pinion 13 engages the gear 9 and the pinion l2 disengages the gear 8 the bit and valve will lJC-l'UttltCtl in the opposite direction so that an oscillatory movement is given to the valve. This may be continued until the abrasive substance \vorks oil the seat.- The valve may be raised a trifle to allow the abrasive substance above the same to Work its way onto the seat and the grinding continued. The valve may then be entirely raised from its seat and a new and finer abrasive substance placed thereon so as to givethe finish touches and grind out any grooves which may be in the seat.

It will thus be seen that the. valve wil' be held on the bit by magnetic force so that it may be readily raised therefrom.

It will thus be seen that I have provided a machine for grinding valves which will hold the valves thereon by magnetic force and will give an oscillatoigya movement to the valves on their seats. i

lVhile I have illustrated and described a particular embodiment of my invention, I have merely done so for the sakeiot' convenience and I do not wish to be limited to that particular embodiment as it is obvious that numerous changes may be made within the details of construction thereof without in any way departing from the spirit of the invention or exceeding the scope of the appended claim.

\Vhat I claim 'is:

In an electro-magnetic valve grinder, the combination with a easing, of a shaft revolubly mounted therein, a gear on one end of said shat't, a motor for driving said gear, a plate having a pair of segmental gears thereon on the other end oi said shaft, a vertically extending shatt having pinions thereon on the opposite sides of the center of the said plate and adapted to alternately engage said gears and a magnetic bit detachably mounted on the lower end of said vertical shaft.

in testimony whereof, I ailix my signature, in the presence ot two witnesses.

lIlAltLlCS lllNK. Witnesses:

(lnnmc A. BAnNns, Bnn'r S. GonniIAM. 

